How to put two divs on the same line with CSS in simple_form in rails?

Putting two divs on the same line is an old question. But I can't find a solution when working with simple_form in rails. What I want to do is to display content and its label on the same line. The width of the label is 125px (

.left

) and the content is on the right (

.right

). The text in the label is aligned to the right and the text in content is aligned to the left.